cannot launch instance

[Husni Alhamdani]

i have problem while to launch the instance, i'm using ubuntu 18.04 LTS and openstack Queen.

And when i want to launch instance i got this error "Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'keystoneauth1.exceptions.connection.UnknownConnectionError'> (HTTP 500) (Request-ID: req-7302d9ed-0485-4714-9e57-c15d21a66dbd"

and this is the compute service (nova-api) log :

"2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi return self.session.request(url, method, **kwargs)
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi File "/usr/lib/python2.7/dist-packages/keystoneauth1/session.py", line 698, in request
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi resp = send(**kwargs)
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi File "/usr/lib/python2.7/dist-packages/keystoneauth1/session.py", line 776, in _send_request
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi raise exceptions.UnknownConnectionError(msg, e)
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi UnknownConnectionError: Unexpected exception for htpp://controller:9696/v2.0/security-groups?fields=id&id=adf0b87b-28d0-4295-a6dd-222ed065ffc2: No connection adapters were found for 'htpp://controller:9696/v2.0/security-groups?fields=id&id=adf0b87b-28d0-4295-a6dd-222ed065ffc2'
2018-06-25 10:53:01.724 2634 ERROR nova.api.openstack.wsgi
2018-06-25 10:53:01.729 2634 INFO nova.api.openstack.wsgi [req-5bfdf750-70c1-470b-b849-895a60c4deb0 - - - - -] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'keystoneauth1.exceptions.connection.UnknownConnectionError'>
2018-06-25 10:53:01.737 2634 INFO nova.osapi_compute.wsgi.server [req-5bfdf750-70c1-470b-b849-895a60c4deb0 - - - - -] 20.20.20.10 "POST /v2.1/servers HTTP/1.1" status: 500 len: 665 time: 0.8935342"

[Eric Fried (efried)]

This appears to be a user error:

'htpp://'

is misspelled, should be 'http://'.

This URL comes from nova.conf or the service catalog.